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Old 01-11-2024, 12:43 PM   #5
Blue Bowtie
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Re: AC Delco Oil Filter P/N Changes

Jim - Good information.

I've been watching this closely since ordering a '23 Traverse with the 217-inch V-6 a year ago. Those engines ship with a "shortie" version of the PF63 for a variety of reasons. Those engines are highly susceptible to problems from dirty oil, mostly affecting the VVT cam phasers. The initial oil and filter got dumped at 547 miles.

It has been getting nothing but the 12731742 version of the PF63 (not "E") full length filters and Mobil1 5W-30 Dexos-approved oil. It's on its fifth oil fill at 5,900 miles, mainly to get break-in particulates out as soon as possible given the 15 feet of timing chain, the filter, and sump design.

The saga of the "E" filter series is pretty well documented across the internet, and the supposition is that the bypass was reduced to reduce idle engine load and produce better CAFE numbers to help GM make fuel economy goals. I'm not willing to play that game either. It may actually be a GOOD thing that those "E" filters are difficult to find in the aftermarket.

BTW - I normally use Puro filters and occasionally Wix, but this is under an extended warranty and I will play their game for the first few years just to avoid arguments. The PF63 (12731742) is good enough to do the job as long as the "severe" service schedule is applied for change intervals. I have no problem with the plastic filter core liner until I see one that has failed. The openings in the plastic liner appear to be much larger than the perforations in the steel core liners, which might have some benefit for filter element flow-through.
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